This package is abandoned and no longer maintained. The author suggests using the extum/flarum-ext-signature package instead.
There is no license information available for the latest version (dev-master) of this package.
Signature support to your Flarum forum.
dev-master 2018-08-14 14:05 UTC
Add signature support to your Flarum forum.
Use Bazaar or install manually:
composer require extum/flarum-ext-signature
composer require extum/flarum-ext-signature php flarum cache:clear